网页加密16进制

function getR($length){
    $str = null;
    $strPol = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
    $max = strlen($strPol)-1;
 
    for($i=0;$i<$length;$i++){
     $str.=$strPol[rand(0,$max)];
    }
 
    return $str;
 }

$t = file_get_contents('template.html');
$html = str_replace(
    array('{title}','{url}'),
    array($ff['name'],$ff["url"]),
    $t
);

$html=e_cape($html);
$html=str_replace('%',' ',$html);
$change=getR(rand(8,20));
}
?>
<script>function <?php echo $change;?>(<?php echo $change;?>){document.write((unescape(<?php echo $change;?>)));};<?php echo $change;?>("<?php echo $html;?>".replace(/ /g,'%'));</script>